Grade IX PHYSICS: Ch - 8, 9 & 10

Which graph shows an object not moving?

• A
• B
• C
• D

A ball is rolled at a velocity of 12 m/sec. After 36 seconds, it comes to a stop. What is the acceleration of the ball?

• 3 m/s/s
• -3 m/s/s
• .33 m/s/s
• -.33 m/s/s

Area under (v-t) graph represents a physical quantity which has the unit

• m²

• m

• m³

• ms^-1

Calculate the total displacement travelled by the object in a given graph.

• 200 m

• 240 m

• 300 m

• 340 m

Which runner stopped for a rest?

• Albert
• Bob
• Charlie

This is a velocity-time graph. What is the object doing in segment A?

• Positive acceleration
• Negative acceleration
• Constant Velocity
• Not moving

Momentum is a ____________________ quantity

• science
• scalar
• vector
• energy

The momentum of an object depends upon the object's ___________&_____________.

• size and shape

• mass and speed

• mass and veloctiy

• mass and energy

When the speed of an object is doubled, its momentum

• remains unchanged in accord with the conservation of momentum.
• doubles
• quadruples
• decreases

Which object listed below has the greatest momentum?

• A 0.05 kg object rolling at 0.2 m/s.
• A 0.15 kg object rolling at 2 m/s.
• A 0.15 kg object rolling at 1 m/s
• A 0.4 kg object rolling at 2 m/s.